The smile that says everything's alright! Endangered gorilla gives birth to healthy baby in Philadelphia Zoo after a team of doctors who usually treat humans were called in to help with difficult labor

Kira, 17, went into labor on Thursday, but by Friday the birth had not progressed

The team included an ob/gyn, surgeons and anesthesiologists from hospitals affiliated with the University of Pennsylvania and Thomas Jefferson University, as well as University of Pennsylvania School of Veterinary Medicine.

A similar team was in place for a gorilla birth at the zoo last year, but the emergency response wasn't needed.

After one-and-a-half hours, the team delivered the male baby using forceps and an episiotomy, a procedure to enlarge the birth opening.

'It was an anxious and dramatic day at the zoo, but in the end a tremendously rewarding one,' said Andy Baker, the zoo's chief operating officer.

The team had been selected and prepared prior to Kira going into labor. A similar team to the one helping Kira (pictured) had been put in place for a gorilla birth last year, but didn't need to be used

'It was an anxious and dramatic day at the zoo, but in the end a tremendously rewarding one,' said Andy Baker, the zoo's chief operating officer

This is the moving moment that the baby is delivered from Kira's womb. It looks positively tiny compared to its parents

The infant is the latest addition to Philadelphia Zoo's menagerie; another gorilla baby was born last year